Jon Cohen, Dennis NormileScience’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.In what has become a familiar pattern, the COVID-19 vaccine landscape has changed overnight, simultaneously raising hopes that more people may soon get vaccinated and triggering confusion. “It’s crazy,” says immunologist John Moore, a vaccine researcher at Weill Cornell Medicine. “Every morning, it’s just, What’s going on?"First, Beijing Biological Products Institute, a division of China National Biotec Group (CNBG), posted a brief announcement online that its vaccine had a 79.34% efficacy in a phase III study and was safe.